package com.xzqwjw.taskmanager.utility;

import com.xzqwjw.taskmanager.R;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;

public class ClearEditText extends EditText implements OnFocusChangeListener,
    TextWatcher {
  /**
   * ɾ����ť������
   */
  private Drawable mClearDrawable;

  public ClearEditText(Context context) {
    this(context, null);
  }

  public ClearEditText(Context context, AttributeSet attrs) {
    // ���ﹹ�췽��Ҳ����Ҫ����������ܶ����Բ�����XML���涨��
    this(context, attrs, android.R.attr.editTextStyle);
  }

  public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
  }

  private void init() {
    // ��ȡEditText��DrawableRight,����û���������Ǿ�ʹ��Ĭ�ϵ�ͼƬ
    mClearDrawable = getCompoundDrawables()[2];
    if (mClearDrawable == null) {
      mClearDrawable = getResources().getDrawable(
          R.drawable.emotionstore_progresscancelbtn);
    }
    mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(),
        mClearDrawable.getIntrinsicHeight());
    setClearIconVisible(false);
    setOnFocusChangeListener(this);
    addTextChangedListener(this);
  }

  /**
   * ��Ϊ���ǲ���ֱ�Ӹ�EditText���õ���¼������������ü�ס���ǰ��µ�λ����ģ�����¼� �����ǰ��µ�λ�� �� EditText�Ŀ�� -
   * ͼ�굽�ؼ��ұߵļ�� - ͼ��Ŀ�� �� EditText�Ŀ�� - ͼ�굽�ؼ��ұߵļ��֮�����Ǿ�������ͼ�꣬��ֱ����û�п���
   */
  @SuppressLint("ClickableViewAccessibility")
  @Override
  public boolean onTouchEvent(MotionEvent event) {
    if (getCompoundDrawables()[2] != null) {
      if (event.getAction() == MotionEvent.ACTION_UP) {
        boolean touchable = event.getX() > (getWidth()
            - getPaddingRight() - mClearDrawable
            .getIntrinsicWidth())
            && (event.getX() < ((getWidth() - getPaddingRight())));
        if (touchable) {
          this.setText("");
        }
      }
    }

    return super.onTouchEvent(event);
  }

  /**
   * ��ClearEditText���㷢���仯��ʱ���ж������ַ��������������ͼ�����ʾ������
   */
  @Override
  public void onFocusChange(View v, boolean hasFocus) {
    if (hasFocus) {
      setClearIconVisible(getText().length() > 0);
    } else {
      setClearIconVisible(false);
    }
  }

  /**
   * �������ͼ�����ʾ�����أ�����setCompoundDrawablesΪEditText������ȥ
   *
   * @param visible
   */
  protected void setClearIconVisible(boolean visible) {
    Drawable right = visible ? mClearDrawable : null;
    setCompoundDrawables(getCompoundDrawables()[0],
        getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
  }

  /**
   * ��������������ݷ����仯��ʱ��ص��ķ���
   */
  @Override
  public void onTextChanged(CharSequence s, int start, int count, int after) {
    setClearIconVisible(s.length() > 0);
  }

  @Override
  public void beforeTextChanged(CharSequence s, int start, int count,
                                int after) {
  }

  @Override
  public void afterTextChanged(Editable s) {
  }

  /**
   * ���ûζ�����
   */
  public void setShakeAnimation() {
    this.setAnimation(shakeAnimation(5));
  }

  /**
   * �ζ�����
   *
   * @param counts 1���ӻζ�������
   * @return
   */
  public static Animation shakeAnimation(int counts) {
    Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
    translateAnimation.setInterpolator(new CycleInterpolator(counts));
    translateAnimation.setDuration(1000);
    return translateAnimation;
  }

}
